Karen Aijou is the protagonist of the Shoujo☆Kageki Revue Starlight franchise. She is a second-year student from the Actor Training Department at Seisho Music Academy's 99th Graduating Class.

Set out on the road to becoming a Stage Girl after being captivated by a performance of "Starlight" she saw as a child. Always boisterous and cheerful, but hates early morning lessons. She joins the mysterious Revue with Hikari, who crossed fates with her when they were young girls.

(Source: Revue Starlight Wiki)